diff --git a/buildargs.env b/buildargs.env
index 15df8ed..dce50c7 100644
--- a/buildargs.env
+++ b/buildargs.env
@@ -2,9 +2,9 @@
 BUILD_TAG=bookworm
 BUILD_TAG_LATEST=n
 BUILD_COUNTRY=de
-BUILD_LANG=
-BUILD_LANGUAGE=
-BUILD_LC_ALL=
+BUILD_LANG=de_DE.UTF-8
+BUILD_LANGUAGE=de_DE:de
+BUILD_LC_ALL=de_DE.UTF-8
 BUILD_TZ=Europe/Berlin
 BUILD_BASE_IMAGE=debian:${BUILD_TAG}
 BUILD_MAINTAINER=pi-farm